signal-desktop/js/modules/privacy.js
2018-03-26 16:38:34 -04:00

67 lines
1.7 KiB
JavaScript

/* eslint-env node */
const Path = require('path');
const compose = require('lodash/fp/compose');
const escapeRegExp = require('lodash/escapeRegExp');
const isRegExp = require('lodash/isRegExp');
const isString = require('lodash/isString');
const PHONE_NUMBER_PATTERN = /\+\d{7,12}(\d{3})/g;
const GROUP_ID_PATTERN = /(group\()([^)]+)(\))/g;
const APP_ROOT_PATH = Path.join(__dirname, '..', '..', '..');
const APP_ROOT_PATH_PATTERN = (() => {
try {
// Safe `String::replaceAll`:
// https://github.com/lodash/lodash/issues/1084#issuecomment-86698786
return new RegExp(escapeRegExp(APP_ROOT_PATH), 'g');
} catch (error) {
return null;
}
})();
const REDACTION_PLACEHOLDER = '[REDACTED]';
// redactPhoneNumbers :: String -> String
exports.redactPhoneNumbers = (text) => {
if (!isString(text)) {
throw new TypeError('"text" must be a string');
}
return text.replace(PHONE_NUMBER_PATTERN, `+${REDACTION_PLACEHOLDER}$1`);
};
// redactGroupIds :: String -> String
exports.redactGroupIds = (text) => {
if (!isString(text)) {
throw new TypeError('"text" must be a string');
}
return text.replace(
GROUP_ID_PATTERN,
(match, before, id, after) =>
`${before}${REDACTION_PLACEHOLDER}${id.slice(-3)}${after}`
);
};
// redactSensitivePaths :: String -> String
exports.redactSensitivePaths = (text) => {
if (!isString(text)) {
throw new TypeError('"text" must be a string');
}
if (!isRegExp(APP_ROOT_PATH_PATTERN)) {
return text;
}
return text.replace(APP_ROOT_PATH_PATTERN, REDACTION_PLACEHOLDER);
};
// redactAll :: String -> String
exports.redactAll = compose(
exports.redactSensitivePaths,
exports.redactGroupIds,
exports.redactPhoneNumbers
);